Closure plugs



Sept. 29, 1959- said camrning edge portions when the box is closed whereby internal pressure in the box from a folded advertising brochure or the like will tend to urge said detent portions upwardly along the camming edge portions and draw the yieldable latch means into a locked condition.

4. In a tablet box as set forth in claim 3 in which said recessed portions have a substantially D-shape and are of a substantially larger area than said detent portions,

J. M. MARCHYN CLOSURE ewes Filed July '5, 1955 said detent portions having a circular configuration and movable away from said camming edge portions when the box is open.

5 References Cited in the file of this patent V UNITED STATES PATENTS Nyden Apr. 16, 1940 Hermani Dec. 27, 1949 

